Evaluation of DIVEX AGA Commercial Mask
1983
Middleton, James R | Evans, W A | Jantzen, M G | Maulbeck, R C
An open circuit demand full-face mask (FFM) was evaluated in both manned and unmanned modes on air in accordance with NAVSEA Task No. 81-3. The mask, designed for use with open circuit (O/C) SCUBA, is produced by AGA SPIRO of Lindingo, Sweden and modified for the umbilical supplied use by Divers Exchange (DIVEX) of Harvey, Louisiana. The purpose of the task was to provide unmanned performance data and open water operational data to aid in the selection of a new FFM to replace the current U.S. Navy Lightweight Mask (Jack Browne). Unmanned breathing resistance, respiratory work ad umbilical pressure drop studies were conducted using a hyperbaric breathing simulator at depths up to 198 feet-of-seawater (FSW) at simulated work rates ranging from light to extreme. Open water manned testing was conducted on board an operational submarine tender where human and operational factor considerations were evaluated. Results of unmanned testing revealed the DIVEX AGA commercial mask to perform adequately for shallow water diving operations not exceeding 66 FSW with either 3/8 or 1/2 inch inside diameter (ID) umbilicals in both 200 and 300 ft. lengths tested. Manned testing showed the AGA mask to be a lightweight, easy to use and maintain underwater breathing apparatus (UBA).
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